DIAPH1 and microcephaly: In addition to the absence of a hearing phenotype in Dia1‐KO mice in the present study, patients with loss of functional variants in DIA1 (p.Q778X, p.F923 fs, and p.R1049X) suffer from microcephalus, blindness, and seizure, but are not deaf (Al‐Maawali et al, 2016; Ercan‐Sencicek et al, 2015).